Update Japanese translations

[shu-mutou]

No description provided.

[codecov]

Codecov Report

Merging #5560 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #5560   +/-   ##
=======================================
  Coverage   42.25%   42.25%           
=======================================
  Files         171      171           
  Lines        7919     7919           
=======================================
  Hits         3346     3346           
  Misses       4333     4333           
  Partials      240      240           

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[atoato88]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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